OK, here's my chip in the pot.
For years I backpacked the Colorado Rockies carrying .357 Magnum revolvers. I had a friend, now gone, who advocate for the caliber, saying it would handle any animal I might encounter there. He told me black bears are easily taken with that caliber, and, at the time, there were no brown bears there.
In the late '70s I began backpacking in the Idaho Backcountry with a friend who had done that for years. He said that if I carried a .357 Magnum I should be sure to file off the front sight so it wouldn't hurt so much when the bear shoved it up my rectum. He carried a Ruger .44 mag.
I went through several .44 magnum revolvers, settling first on a Colt Anaconda. To lighten my trail weight I later got a S&W 629 and carried my handloads, 300-gr bullets at 900fps from its 4" barrel. This gun was painful to shoot with this ammo.
Long story shortened, I still carry a 329PD in black bear territory with my handloads, but alternate my 627PC with 5" barrel, or 627-5 Pro Series 8-shot with a barrel just over 4". I also like my 625 .45-Colt with 4" barrel with 260-gr hard-cast lead bullets at 850fps (John Taffin loads). And a couple others, just because I can.
I am, sadly, getting a bit old to backpack the Idaho Backcountry but would carry a 6" 29 if I ever do again, with my heavy handloads. I'd rather carry hand grenades, but, you know . . ..